diff --git a/pkgs/applications/networking/maestral-qt/default.nix b/pkgs/applications/networking/maestral-qt/default.nix
index 1394bff2c1c0..3c30bc4fd3f6 100644
--- a/pkgs/applications/networking/maestral-qt/default.nix
+++ b/pkgs/applications/networking/maestral-qt/default.nix
@@ -11,6 +11,8 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "maestral-qt";
   version = "1.9.3";
+  pyproject = true;
+
   disabled = python3.pythonOlder "3.7";
 
   src = fetchFromGitHub {
@@ -20,9 +22,11 @@ python3.pkgs.buildPythonApplication rec {
     hash = "sha256-7Lt0Neobtofd1JDoz8BhGn+nFKaMLbM/6z0QQmtEKpA=";
   };
 
-  format = "pyproject";
+  build-system = with python3.pkgs; [
+    setuptools
+  ];
 
-  propagatedBuildInputs = with python3.pkgs; [
+  dependencies = with python3.pkgs; [
     click
     markdown2
     maestral
diff --git a/pkgs/development/python-modules/maestral/default.nix b/pkgs/development/python-modules/maestral/default.nix
index 885911b181c8..52c24504174d 100644
--- a/pkgs/development/python-modules/maestral/default.nix
+++ b/pkgs/development/python-modules/maestral/default.nix
@@ -31,7 +31,7 @@
 buildPythonPackage rec {
   pname = "maestral";
   version = "1.9.3";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.8";
 
@@ -42,7 +42,11 @@ buildPythonPackage rec {
     hash = "sha256-h7RDaCVICi3wl6/b1s01cINhFirDOpOXoxTPZIBH3jE=";
   };
 
-  propagatedBuildInputs = [
+  build-system = [
+    setuptools
+  ];
+
+  dependencies = [
     click
     desktop-notifier
     dbus-python
@@ -67,7 +71,7 @@ buildPythonPackage rec {
 
   makeWrapperArgs = [
     # Add the installed directories to the python path so the daemon can find them
-    "--prefix PYTHONPATH : ${makePythonPath propagatedBuildInputs}"
+    "--prefix PYTHONPATH : ${makePythonPath dependencies}"
     "--prefix PYTHONPATH : $out/${python.sitePackages}"
   ];